Configuration:
Node 1-12 on sb9 is an lv-67g.
It has an edge boost pro as the boot disk
and two samsung 840 PRO ssds in motherboard based hardware raid


Commands used:
Write:
time sh -c "dd if=/dev/zero of=/mnt/bigfile bs=8k count=2000000 && sync"

2000000+0 records in
2000000+0 records out
16384000000 bytes (16 GB) copied, 15.7342 s, 1.0 GB/s

real    0m16.021s
user    0m0.644s
sys     0m11.293s

Read:

Test results for SSD raid
Fakeraid  Write: 1.0 GB/s